Prostatitis is so widespread a disease that affects people from youths to seniors, with approximately a third experiencing a remission of symptoms over a year follow-up. Although the etiology of prostatitis is still not clear, it is mainly thought to be due to infection of bacteria or other microorganisms. Up to now, there is still no research being done on the microbiome (bacterial species) of the prostate. The objective of this study is to look at the etiology of chronic prostatitis(bacteria or non-bacteria prostatitis), mainly focusing on the effect of bacteria in the prostate.